Beebaby Ease Wide Neck Feeding Bottle has an unique shape which allows an easy and frim grip for moms and infant. Replicates the instinctive way baby feeds.It is scientifically designed for peaceful and continous feeeding. Protect you baby from colic, regurgitation and irritability. Beebaby Peristaltic Nipples or Teats has an unique grooved interior which helps in peristalic motion for bby to use natural sucking pattern. the super soft silicone rubber with anti-colic valves prevent unwanted air intake anda minimize colic. This regulates the flow of milk and make baby satisfied and happy.